I have a csv file that is separated by commas without spaces and with will not be separated into multiple variables. Is there something I can do in Matlab? I tried tooling with the delimiter options but to no evail, thank you (I have attached one of the files).

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Walter Roberson
Walter Roberson am 13 Jun. 2018

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S = fileread(FileName);
S(S == '"') = [];
fmt = '%f%f%f%f%f%f';
data = cell2mat( textscan(S, fmt, 'HeaderLines', 1, 'Delimiter', ',', 'CollectOutput', true) );
Now data is a numeric array with 6 columns.
Potentially you might want to use
dd = data(:,1:4);
dd(:,5:6) = 0; %add minutes and seconds column
dt = datetime(dd);
Now dt would express the dates and times as datetime objects. That can be useful in analysis, such as
Wind_Direction = data(:,5);
Windspeed = data(:,6);
T = timetable(Wind_Direction, Windspeed, 'Rowtimes', dt);
and then you can do things like
retime(T, 'daily')
which would give you the daily average wind direction and windspeed.
(However, this in itself would not know about wrapping directions at 360 so the average wind direction could be wrong, such as near 2016,01,24,00)

3 Kommentare

Cameron Power
Cameron Power am 13 Jun. 2018
I keep getting an error with the first part trying to relate it to my specific file (nicknamed test.csv), where and how should it be added
FileName = 'test.csv';
Cameron Power
Cameron Power am 14 Jun. 2018
Brilliant, thank you all.

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Weitere Antworten (1)

Jan
Jan am 13 Jun. 2018

0 Stimmen

Remove the double quotes at first:
S = fileread(FileName);
S(S == '"') = [];
fid = fopen(FileName, 'w');
fwrite(fid, S, 'char');
fclose(fid);
Then the standard tools should word: readtable, csvread, sscanf, textscan.

2 Kommentare

Cameron Power
Cameron Power am 13 Jun. 2018
Forgive me if I am being oblivious but how do I implement this?
... That is the implementation, other than the fact that you would proceed from there to
T = readtable(FileName);

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